Question: (a) Consider the simplistic model that human births are evenly distributed over the 12 calendar months. If a person is randomly selected, say, from a

(a) Consider the simplistic model that human births are evenly distributed over the 12 calendar months. If a person is randomly selected, say, from a phone directory, what is the probability that his or her birthday would be in November or December?
(b) The monthly number of births(thousands), in the United States during a recent year, are summarized in the table below. Calculate the relative frequency of births for each month and comment on the plausibility of the uniform probability model.

Jan. Feb. March April May June 319 299 336 309 334 336

Jan. Feb. March April May June 319 299 336 309 334 336 July Aug. Sept. Oct. Nov. Dec. Total 348 363 351 347 331 335 4008

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